monitor: Add SPDX License Identifier

monitor: Add SPDX License Identifier

This patch adds SPDX License Identifier and removes the license text.

-------------------------------------
       License            COUNT
-------------------------------------
 LGPL-2.1-or-later    :     47

License: LGPL-2.1-or-later
   monitor/bt.h
   monitor/hcidump.h
   monitor/avdtp.h
   monitor/crc.c
   monitor/sdp.c
   monitor/hwdb.c
   monitor/intel.h
   monitor/avctp.c
   monitor/control.h
   monitor/display.c
   monitor/a2dp.c
   monitor/ll.c
   monitor/ll.h
   monitor/jlink.h
   monitor/broadcom.h
   monitor/lmp.c
   monitor/keys.c
   monitor/ellisys.c
   monitor/main.c
   monitor/ellisys.h
   monitor/hwdb.h
   monitor/display.h
   monitor/jlink.c
   monitor/rfcomm.h
   monitor/packet.c
   monitor/crc.h
   monitor/keys.h
   monitor/sdp.h
   monitor/rfcomm.c
   monitor/avdtp.c
   monitor/a2dp.h
   monitor/avctp.h
   monitor/vendor.h
   monitor/hcidump.c
   monitor/intel.c
   monitor/tty.h
   monitor/control.c
   monitor/lmp.h
   monitor/analyze.c
   monitor/bnep.c
   monitor/l2cap.c
   monitor/vendor.c
   monitor/packet.h
   monitor/broadcom.c
   monitor/analyze.h
   monitor/l2cap.h
   monitor/bnep.h

Signed-off-by: Anuj Jain <anuj01.jain@samsung.com>
Signed-off-by: Ayush Garg <ayush.garg@samsung.com>